I have tried Ultimate SEO and all in one SEO and it took me time to do so...
The transfer from one to another now is made easy to do...
I have come to an conclusion that with all in mind (support, blog, walk-through, etc.) WordPress SEO is the number one
Great job yoast team and thanks for this fine peace of code!

now the bad thing

it has sme issues ith 404 pages - while using strip category or any of it's predefined rewriting rules errors on multilingual sites occure